Specify a config file for vpxclient.exe?

Is there a way to specify which VpxClient.exe.config file the vpxclient should read in via the command line?

I have 2 different config files for when I'm on site and for when I'm outside the local network. The differences are the different ports used to connect to the host server.

I already use -s -u and -p to auto-login, but as of now I have to manually copy/rename my config files depending on where I am.